Means for sharpening pencil-pointers



n. R. RUNDELL.

MEANS FOR SHARPENING PENCIL POINIERS.

APPLICATION FILED AUG-l2. 1919.

1,391,080. PatentedSept. 20,1921.

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UNITED STATES PATENT OFFICE.

RAYMOND R. RUNDELL OF ELMIRA, NEW YORK, ASSIGNOR OF ONE-FOURTH TO GEORGE C. HAESLOOP, OF ELMIRA, NEW YORK.

MEANS FOR SHARPEiN'ING PENCIL-POINTERS.

Specification of Letters Patent. Patented Sept. 20, 1921.

Application filed August 12, 1919. Serial No. 316,984.

To all whom it may concem:

Be it known that I, RAYMOND R. RUNDELL, a citizen of the United States, residin at Elmira, in the county of Chemung and tate of New York, have invented certain new and useful Improvements in Means for Sharpening Pencil-Pointers, of which the following is a specification.

My invention relates to means for the regrinding, sharpening and restoring the cutting edges of pencil sharpeners and similar devices.

The objects of my invention are First, to provide a simple and cheap device for sharpening pencil pointers which can be quickly and easily applied and used, readily removed from the pointer after the same has been sharpened without in any way destroying the efficiency of the device or impairing the proper and quick operationof the pencil pointer.

Second, to provide a sharpening device which can be applied to a pencil pointer,

without the necessity of taking said pointer.

apart and eliminating all liability of breakage of the sharpening device or pencil pointer.

Third, to provide a sharpening device of the character referred to in which the pencil pointer in being sharpened reacts on the.

sharpening device insuch a manner as to automatically restore and reserve said sharpening device in proper s ape and condition to properly and efliciently continue to perform its function of sharpening the pencil 'pointer without any attention whatsoever, thereby not only insuring its continuous employment but also a long life of its utility.

Fourth, other-objects and advantages of the sharpening device will appear and be apparent from the detailed description of the construction and mode of operation of the device to be hereinafter given.

The invention consists of structural characteristics and relative arrangements of elements, which will be hereinafter more fully described and particularly pointed out in the appended claims.

In the one sheet of drawings similar reference characters indicate the same parts in the several figures, of which Figure 1, is a vertical section through a pencil pointer, and showing in elevation the position the sharpening device assumes when in use.

Fig. 2, is a side elevation partly in section of one form of the sharpening device.

Figs. 3 and 4 are views similar to Fig. 2 showing modified forms of the device.

For illustration the invention will be described in connection with its application and manner of using the same on a common and 'well known form of pencil sharpener known as the Boston Sharpener, and disclosed for example in U. S. Patent No. 1,249,579, dated December 11, 1917, said type of sharpener being shown in Fi 1, in which 10 is the standard provided W151 a foot portion 11 by means of which it may be screwed or otherwise secured to a support. The standard 10 has formed integral therewith a stationary head portion 12 and an elongated bearing 13 for the shaft 14 of the cutter carrier 15. The head portion 12 is recessed and is provided with a series of internal gear teeth 16, as shown. The cutter carrier 15 is connected at one end with the shaft 14, said shaft being provided with a handle 17 by means of which the cutter carrier 15 is revolved and at the end said carrier 15 is provided with a tubular pencil guiding portion 19, in which the pencil to be sharpened is inserted. The cutter carrier 15 is open at its center portion and two rotary cutters 20 with spirally arranged cutting edges are mounted upon spindles 21 to rotate in said open center portion, said spindles 21 being provided at one end with gears 22 which are arranged to mesh with the internal gear teeth 16 in the head portion 12. 23 is a transparent chip receptacle detachably secured in any suitable manner to the stationary head portion 12, and is adapted to re ceive the chips as they are cut from the wood and lead of the pencil during the usual pencil pointing operations, or catch the grindings from the improved sharpening device, and rotary cutters 20 during the sharpening of the pencil pointer to be presently described.

The foregoing parts described above form no part of the present invention and are simply disclosed as an example of the class and type of devices which are capable of utilizing my improved method and sharpening device.

Referring to Fig. 2, the sharpening device is preferably constructed and shaped in the form of a cylinder 24 having a conical end or ends 24 similar to a single or double pointed lead pencil, and said conical end is of such configuration or shape that when the same is inserted into any pencil pointer as shown in Fig. 1 it will assume substantially the same position that a lead pencil takes while being sharpened, and hence will be enabled to come in contact with thespiral cutting edges of the rotary cutters 20, and be seated in the conical-shaped cavity between said cooperating rotary cutters 20. The sharpening device may be made as shown for example in Fig. 2 of a solid stick Ql of carborundum, emery or other suitable grinding agent, or said materials may be finely ground and held together by any sultable binding agent, or made of a rod 25 of steel, wood, fiber or other suitable material as shown in Fig. 3 and used in connection with pulverized or powdered carbor'undum,

emery or other abrading or sharpening mate- 1 rial with or without oil or other fluid, or by coating or impregnating any suitable core 26 with any abrading or grinding material 27 as indicated in Fig. 4. v

The manner of using the sharpening device is as follows:

Assuming the pencil pointer assembled as shown in Fig. 1, the sharpening device of any one of the forms, constructions and materials shown and described with reference to Figs. 2, 3, and 4 is inserted into the pencil pointer in the same manner and adjusted in a like position as if it were a lead encil to be sharpened. After the device 24 as been so adjusted it is held stationary and prevented from being rotated by one hand of the operator; while the other hand grasps the handle 17 and rotates the same in a direction opposite to and reversely to that employed when sharpening a lead pencil. This reverse movement of the handle 17 causes the cutters 20 and their spirally arranged .cutting edges to revolve in directions around the sharpening device 24 and rotateabout their axes or spindles oppositely to those during the normal use of the pencil pointer in sharpening a pencil, and the rear or under faces of the spiral cutting edges of the cutters 20 come in, contact with and are ground down or abraded by the stationary sharpening device 24, in such a manner as to quickly and correctly restore well defined and sharp front spirally arranged cutting edges to said cutters 20.

After the foregoing sharpening operation is effected the device 24 can be readily withdrawn without disturbing or making any adjustments of the pencil pointer parts.

It will beunderstood that while I have shown and described my preferred form and composition of sharpening device the same can be modified in many particulars as would readily suggest themselves to any one skilled in the art without in any way changing the functions and efficiency of the same.

From the foregoing disclosure of the device described, it will be seen that all the advantages and objects recited in the statement of invention are fully carried out and accomplished with the simplest ossible construction, which can be cheap y manufac tured, quickly and universally applied to a certain type of pencil pointers without the use of any skill and is constantly in condition for immediate use without any attention whatsoever.

I do not herein claim the method disclosed for sharpening a pencil pointer of the character indicated which will be the subject matterof a separate and independent application filed in due time.

lVhat I claim is 1. A new article of manufacture for regrindingthe blades of a lead pencil pointer of a type having apair of separated 0ppositely disposed and inclined combined revolving and reversibly rotatable cutters provided with cutting edges, which consists of an abrading device having a tapered end of such an angle and so formed, constructed and arranged as to be adapted to be inserted and held non-rotatably between the separated and inclined rotatable cutters and have frictional and grinding contact with substantially the entire cutting edges of said cutters when said cutters are simultaneously revolved and rotated about said tapered abrading device.

2. A new article of'manufacture for regrinding the blades of a lead pencil pointer of a type having a pair of separated oppositely disposed and inclined combined revolving and reversibly rotatable cutters provided with cutting edges, which consists of an abrading device having a tapered end substantially conical and of such angle in. shape and so constructed and arranged as to be adapted to be inserted and held nonrotatably'between the separated and inclined rotatable cutters and have frictional and grinding contact with substantially the entire cutting edges of said cutters when said cutters are simultaneously revolved and rotated about saidtapered abrading device.

In testimony whereof, I afiix-my signature. 

